CN106104721A - The DC of the big DC electric current in transformator is compensated - Google Patents
The DC of the big DC electric current in transformator is compensated Download PDFInfo
- Publication number
- CN106104721A CN106104721A CN201480077195.8A CN201480077195A CN106104721A CN 106104721 A CN106104721 A CN 106104721A CN 201480077195 A CN201480077195 A CN 201480077195A CN 106104721 A CN106104721 A CN 106104721A
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- CN
- China
- Prior art keywords
- component
- transformator
- power electronic
- controller
- equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
- G05F3/02—Regulating voltage or current
- G05F3/08—Regulating voltage or current wherein the variable is dc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
Abstract
Disclose a kind of system and method for the one or more DC components in electrical system are compensated.The disclosedest system includes: one or more sensors, is used for sensing the one or more DC component.This system also includes: one or more DC component controllers, for producing one or more reference signals according to the one or more signals received from the one or more sensor.In addition, this system also has: one or more controllers, for according to the one or more reference signal received from the one or more DC component controller, producing one or more igniting pulse；And one or more valve gear, for one or more controllable branch paths being charged, to balance the one or more DC component of described electrical system.
Description
Technical field
The present invention relates to a kind of method and system for carrying out DC compensation in transformator, particularly relate to a kind of to transformation
Big DC electric current in device iron core carries out the method and system of DC compensation.
Background technology
In power network, transformer coupled between AC power system and transducer.DC electric current in power network may be right
Transformator has a negative impact.In principle, the voltage at the time-derivative of the magnetic flux in the iron core of transformator and transformer terminal
Proportional.Under preferable working condition, i.e. when DC electric current does not affect the iron core of transformator, the terminal voltage of transformator and load
Electric current actually sinusoidal and polar-symmetric.Therefore, magnetic flux is also symmetrical, and i.e. positive half cycle and the negative half period of magnetic flux is right
Claim, in transformator, in two half cycles, produce equal magnetic force.
On the other hand, if the load current of transformator comprises DC current component, then the DC produced in magnetic flux skew will
Cause transformator saturated.Owing to the DC of magnetic flux offsets, the positive half cycle of magnetic flux and negative half period become asymmetric, and i.e. one half cycle will be to
Driven saturated, and the stress that another half cycle experience is less than design.
According to description above, it is evident that the DC component in transformer core causes the increase of noise level, high idle merit
Rate consumes and the increase of the most non-loaded loss.The general source of DC component be GIC (geomagnetic induction current,
Geomagnetically induced currents), such as SVC (static VAR compensates, static VAR
Power electronic equipment in the network of network of compensation)/STATCOM unit and/or HVDC transmission system.
It is referred to the various methods of impact for compensating or reduce DC component in power system in the prior art.
The method of the DC component in the compensator transformer iron core of the most frequently used a kind of practicality is to be used together sensor with Transformer Winding
And compensative winding.In this approach, place a sensor at above the iron core of transformator.Sensor measurement transformer core
The time-derivative of magnetoelectricity pressure, and relatively positive and negative half cycle, to detect DC skew.Based on comparing, sensor is to being placed on transformator
Outside DC compensates (DCC) unit and sends bipolar voltage signal.DCC unit is that DC is divided by the controlled injection by DC ampere-turn
Amount carries out the system of active compensation, and it works relative to the DC ampere-turn of the load current being derived from DC biasing.In other words,
Based on the bipolar voltage received from sensor, DCC unit by by also serve as compensative winding known to auxiliary transformer winding,
The phased switching of the power circuit that the partial power of reactor and DCC unit itself is constituted, injects the AC electricity of superposition DC component
Stream.
The little DC electric current and eliminating that above-mentioned DC compensation method is responsible in electrical system introducing increases due to DC electric current
The noise added.But, this method is not suitable for especially big as the geomagnetic induction current (GIC) that makes exciting power significantly increase
DC component.It is overheated that the increase of the exciting power caused due to big DC component occasionally results in transformer core, and also causes becoming
Eddy-current loss in the metal part of depressor winding and transformator increases.Known in the prior art for big DC component compensation
Technology or use hot overdimensioned transformator, or in transformator use DC block system.Propose in the prior art
Technology only help to protection equipment and avoid the impact of big DC electric current, do not have technical scheme to can be used for the big DC in compensator transformer
Electric current, especially GIC.
According to description above, it is evident that exist the effective system for the big DC electric current in transformator is compensated
Strong needs with method.
Summary of the invention
Therefore, it is an object of the invention to provide a kind of economy for carrying out DC current compensation in transformator and effectively
System and method.
Above-mentioned purpose is by providing according to claim 1 for carrying out the one or more DC components in electrical system
The method compensated and the system for the one or more DC components in electrical system are compensated according to claim 6
Realize.Other embodiments of the invention relate in the dependent claims.
In a first aspect of the present invention, disclose for the one or more DC components in electrical system are compensated
Method.The method according to the invention, at the first step of the method, derives one or more letter from one or more DC components
Number, and at one or more controllers, receive this one or more signals.Then, these one or more signals are converted to
One or more igniting pulses.It is used for triggering one or more valve gear by these one or more igniting pulses.One or more
One or more dc components that controllable branch path/equipment is matched with in electrical system.By these one or more controllable branch path/equipment
These the one or more DC components controlling coupling balanced electrical system carried out.
Additionally, according to the first aspect of the invention, one or more sensors one or more DC components of sensing, and
Before one or more controllers receive one or more signals, one or more DC components are converted to one or more letter
Number.
Additionally, according to the first aspect of the invention, before triggering one or more valve gears, according to one or more
Fundamental frequency that valve gear is associated and one or more phase place, by one or more igniting impulsive synchronization.
In a second aspect of the present invention, disclose for the one or more DC components in electrical system are compensated
System.This system includes the one or more sensors for sensing one or more DC component.This system also include one or
Multiple DC component controllers, for producing one or many according to the one or more signals received from one or more sensors
Individual reference signal.In addition, this system also has one or more controllable branch path/equipment, for according to from one or more
One or more reference signals that DC component controller receives produce one or more igniting pulses, one or more to mate
Branch road/equipment, with one or more DC components of balanced electrical system.
According to the second aspect of the invention, this system also includes one or more trigger set, for synchronizing from one
Or one or more igniting pulses that multiple controller receives.
Correspondingly, the present invention is provided to the one or more DC components in electrical system are compensated effectively and
Economic method and system.
Accompanying drawing explanation
The present invention is further described, wherein below with reference to illustrative embodiment illustrated in the accompanying drawings:
Fig. 1 shows the block diagram of DC compensation system according to an embodiment of the invention, and
Fig. 2 shows the detailed view of DC compensation system according to an embodiment of the invention.
Detailed description of the invention
Each embodiment is described with reference to the drawings, wherein, uses the element that similar reference instruction is similar in the text.
In the following description, in order to illustrate, describe a large amount of detail, to provide comprehensive to one or more embodiments
Understand.It is obvious that these embodiments can be implemented in the case of not having these details.
Fig. 1 shows the block diagram of DC compensation system 100 according to an embodiment of the invention.
DC compensates system 100 and includes transformator 102, high-voltage line 104, low-voltage line 106, controller 110, power electronic equipment
112 and controllable branch path/equipment 114.The most unshowned sensor is connected to the top of the iron core of transformator 102.Sensor
Magnetoelectricity pressure at the iron core of measuring transformer 102, and ratio calibration half cycle and negative half period, to detect DC component.Based on comparing, pass
Sensor sends bipolar voltage signal to controller 110, as shown in Figure 1 by connecting 108.For detect DC component, in transformation
Operation principle and the type of the sensor at the iron core of device 102 are commonly known in the art.
Controller 110 is by connecting the bipolar voltage of 108 receptions sensor sensing at the iron core of transformator 102.Control
The bipolar voltage received is converted to firing pulse by device 110 processed, the most each phase one, and sends it to power electronics and set
Standby 112.The detailed operation of controller 110 describes in fig. 2.At controllable branch path/equipment 114 as shown in Figure 1 via low-voltage line 106
When being connected in series with transformator 102, the power electronic equipment 112 triggered according to firing pulse and controllable branch path/equipment 114 is to depositing
The DC component being in transformator 102 compensates.
In a preferred embodiment of the invention, power electronic equipment 112 can be reverse by the IGCT being connected in series
Thyristor valve to constituting in parallel.Controllable branch path/equipment 114 can be the line that three Deltas controlled by thyristor valve connect
The layout of circle.Each coil of reactor 114 is connected to a phase winding of three-phase transformer 102.At embodiments of the invention
In, valve layout 112 and reactor 114 are the reactors (TCR, thyristor controlled reactor) of thyristor control
A part.
Fig. 2 shows the detailed view of DC compensation system 100 according to an embodiment of the invention.
DC shown in figure 2 compensates system 100 and includes sensor 202, DC component controller 204, power electronic equipment
Controller 208, controllable branch path/safety trigger set 206, power electronic equipment 112 and controllable branch path/equipment 114.DC component
Controller 204, power electronic equipment controller 208 and controllable branch path/safety trigger set 206 are the controls that figure 1 illustrates
The submodule of device 110 processed.As illustrated by FIG, sensor 202 is placed on the top of the iron core of transformator 102.Sensor
202 sense the DC component being present in transformator 102, and send bipolar voltage by connecting 108 to DC component controller 204
Signal.Bipolar voltage signal is the tolerance that there is DC component in the load current of the transformator 102 of Fig. 1.DC component controller
204 receive bipolar voltage signal, and be converted into the branch of the needs that compare of DC component can measured with sensor 202/
Equipment reference signal.In addition, DC component controller 204 also prevents the unbalanced magnetization of transformator and therefore produce two
Subharmonic is unstable, therefore eliminates the DC component in the bipolar voltage signal received.Power electronic equipment controller 208 receives
Branch/equipment reference signal from the needs of DC component controller 204.In addition, power electronic equipment controller 208 is also
By connecting 210 reception reference signals, as shown in Figure 2.Branch/equipment that power electronic equipment controller 208 is received
Reference signal is to firing pulse, the conversion of the most each phase one, and sends firing pulse to trigger set 206.Trigger
Firing pulse is synchronized by set 206, to synchronize.
Power electronic equipment arranges 112 receptions firing pulse from the synchronization of trigger set 206.According to the point synchronized
Fire pulse and controllable branch path/equipment 114 trigger power electronic equipment arrange 112 in the iron core being present in transformator 102,
The DC component i.e. measured by sensor 202 compensates.As it is shown in figure 1, controllable branch path/equipment 114 via low-voltage line 106 with
When transformator 102 is connected in series, carry out DC compensation.
Utilize controllable branch path/equipment to the DC electricity in transformator according to description above it is obvious that the present invention provides a kind of
The system and method that stream compensates.
The disclosed system and method for compensating DC electric current eliminates as in the prior art in the present invention
The needs in transformator to compensative winding proposed.Owing to there is no compensative winding in transformer core, therefore in the present invention
Disclosed in system and method can be additionally used in the big DC electric current compensating such as geomagnetic induction current (GIC).
The system and method for disclosed compensation DC electric current also eliminate design over dimensioning transformator and equipment or with can
Control branch road/equipment uses DC to block the needs of system together in transformator.
It is obvious, therefore, that disclosed invention presents a kind of DC in the transformator being present in electrical system
Effective and the economic system and method that component compensates.
Although describing the present invention in detail with reference to specific embodiment, but it is to be understood that it is real that the present invention is not limited to these
Execute example.According to the disclosure, those skilled in the art are it is conceivable that many deforms and change, without deviating from the present invention described herein
The scope of each embodiment.Therefore, the scope of the present invention is by appended claim rather than by description instruction above.
Being changed, deform and changing in the implication of the equivalent of claim and scope should be considered in the range of it.
Reference numerals list
100 DC compensate system
102 transformators
104 high-voltage lines
106 low-voltage lines
108 connect
110 controllers
112 power electronic equipments
114 controllable branch paths/equipment
202 sensors
204 DC component controllers
206 controllable branch paths/safety trigger set
208 power electronic equipment controllers
210 controllers
Claims (7)
1., for the method compensating the one or more DC components in electrical system (100), described method includes:
-receive one or more signals at one or more controllers (110) place, wherein, the one or more signal is from institute
State one or more DC component to derive；
-the one or more signal is converted to one or more igniting pulse；
-trigger one or more power electronic equipments (112) according to the one or more firing pulse；And
-one or more controllable branch path/equipment (114) are charged, to balance the one or many of described electrical system (100)
Individual DC component.
Method the most according to claim 1, also includes: receive described one at the one or more controller (110) place
Before individual or multiple signal, one or more sensors (202) sense the step of the one or more DC component.
Method the most according to claim 2, also includes: receive described one at the one or more controller (110) place
Before individual or multiple signal, the one or more DC component is converted to the step of the one or more signal.
Method the most according to claim 1, also includes: trigger the one or more power electronic equipment (112) it
Before, according to the one or more frequencies being associated with the one or more power electronic equipment (112), synchronize one or
The step of multiple firing pulses.
Method the most according to claim 1, also includes: trigger the one or more power electronic equipment (112) it
Before, according to the one or more phase places being associated with the one or more power electronic equipment (112), synchronize one or
The step of multiple firing pulses.
6., for the system compensating the one or more DC components in electrical system (100), described system includes:
-one or more sensors (202), are used for sensing the one or more DC component；
-one or more DC component controller (204), receive from the one or more sensor (202) for basis
One or more signals produce one or more reference signals；
-one or more controllers (208), receive from the one or more DC component controller (204) for basis
The one or more reference signal, produces one or more igniting pulse；And
-one or more power electronic equipments (112), for charging to one or more controllable branch path/equipment (114), with flat
The one or more DC component of the described electrical system that weighs (100).
System the most according to claim 6, also includes: one or more trigger set (206), for synchronizing from one
Or one or more igniting pulses that multiple controller (208) receives.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2014/055500 WO2015139743A1 (en) | 2014-03-19 | 2014-03-19 | Dc compensation for high dc current in transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106104721A true CN106104721A (en) | 2016-11-09 |
| CN106104721B CN106104721B (en) | 2018-04-13 |
Family
ID=50390063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480077195.8A Active CN106104721B (en) | 2014-03-19 | 2014-03-19 | The DC of big DC electric current in transformer is compensated |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US10032556B2 (en) |
| EP (1) | EP3100291B1 (en) |
| CN (1) | CN106104721B (en) |
| BR (1) | BR112016020693B8 (en) |
| CA (1) | CA2942991C (en) |
| WO (1) | WO2015139743A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10423181B2 (en) | 2017-03-31 | 2019-09-24 | International Business Machines Corporation | Geomagnetically induced potential compensation |
| US11271402B2 (en) | 2019-04-09 | 2022-03-08 | Smart Wires Inc. | Detection and elimination of DC injection on the power grid system |
| CA3146377A1 (en) | 2019-07-11 | 2021-01-14 | Essam Samir ELSAHWI | System and method for determining the impedance properties of a load using load analysis signals |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2013000A (en) * | 1978-01-20 | 1979-08-01 | Hitachi Ltd Dc | D.C. magnetic field cancellation circuit |
| US20040196675A1 (en) * | 2002-08-05 | 2004-10-07 | David Cope | Self-powered direct current mitigation circuit for transformers |
| CN102985838A (en) * | 2010-04-14 | 2013-03-20 | 奥地利西门子公司 | Method and apparatus for detecting a magnetic characteristic variable in a core |
| CN103270561A (en) * | 2010-09-29 | 2013-08-28 | 奥地利西门子公司 | Device and method for reducing a magnetic unidirectional flux fraction in the core of a transformer |
| CN103765743A (en) * | 2011-07-07 | 2014-04-30 | 香港城市大学 | DC link module for reducing DC link capacitance |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5099410A (en) * | 1990-11-13 | 1992-03-24 | Wisconsin Alumni Research Foundation | Single phase ac power conversion apparatus |
| US5270913A (en) * | 1992-04-06 | 1993-12-14 | D.C. Transformation, Inc. | Compact and efficient transformerless power conversion system |
| CN101681716A (en) * | 2007-06-12 | 2010-03-24 | 西门子变压器奥地利有限责任两合公司 | Electrical transformer with unidirectional flux compensation |
| WO2015142324A1 (en) * | 2014-03-19 | 2015-09-24 | General Electric Company | Hybrid three-level npc thyristor converter with chain-link strings as inner ac switches |
-
2014
- 2014-03-19 CN CN201480077195.8A patent/CN106104721B/en active Active
- 2014-03-19 CA CA2942991A patent/CA2942991C/en active Active
- 2014-03-19 BR BR112016020693A patent/BR112016020693B8/en active IP Right Grant
- 2014-03-19 US US15/126,348 patent/US10032556B2/en active Active
- 2014-03-19 WO PCT/EP2014/055500 patent/WO2015139743A1/en active Application Filing
- 2014-03-19 EP EP14713410.0A patent/EP3100291B1/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2013000A (en) * | 1978-01-20 | 1979-08-01 | Hitachi Ltd Dc | D.C. magnetic field cancellation circuit |
| US20040196675A1 (en) * | 2002-08-05 | 2004-10-07 | David Cope | Self-powered direct current mitigation circuit for transformers |
| CN102985838A (en) * | 2010-04-14 | 2013-03-20 | 奥地利西门子公司 | Method and apparatus for detecting a magnetic characteristic variable in a core |
| CN103270561A (en) * | 2010-09-29 | 2013-08-28 | 奥地利西门子公司 | Device and method for reducing a magnetic unidirectional flux fraction in the core of a transformer |
| CN103765743A (en) * | 2011-07-07 | 2014-04-30 | 香港城市大学 | DC link module for reducing DC link capacitance |
Also Published As
| Publication number | Publication date |
|---|---|
| BR112016020693A2 (en) | 2017-08-15 |
| CA2942991A1 (en) | 2015-09-24 |
| BR112016020693B1 (en) | 2021-12-28 |
| BR112016020693B8 (en) | 2023-04-25 |
| CN106104721B (en) | 2018-04-13 |
| US10032556B2 (en) | 2018-07-24 |
| US20170084386A1 (en) | 2017-03-23 |
| EP3100291B1 (en) | 2019-01-02 |
| CA2942991C (en) | 2019-09-03 |
| EP3100291A1 (en) | 2016-12-07 |
| WO2015139743A1 (en) | 2015-09-24 |
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Effective date of registration: 20230421 Address after: Munich, Germany Patentee after: Siemens energy Global Ltd. Address before: Munich, Germany Patentee before: SIEMENS AG |